/**
*      author: Y_Yao
*      created: 2025-02-01 20:00:46
**/

#include<bits/stdc++.h>

#define int LL
using namespace std;
using LL = long long;
const LL LLINF = 1e18;
const int INF = 0x3f3f3f3f;
string s;

void solve()
{
    cin >> s;
    unordered_map<string,string> m;
    m["N"] = "S";
    m["S"] = "N";
    m["W"] = "E";
    m["E"] = "W";
    m["NE"] = "SW";
    m["SW"] = "NE";
    m["SE"] = "NW";
    m["NW"] = "SE";
    cout << m[s] << endl;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}